e-journal

Genome size in Anthurium evaluated in the context of karyotypes and phenotypes

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Abstract.
Background and aims:
Anthurium is an important horticultural crop from the family Araceae, order Alismatales, a
lineage considered to have diverged from other monocots prior to the cereals. Genome size
and its distribution in Anthurium were investigated to gain a basic understanding of
genome organization in this large genus and to forge a firm foundation for advancement
of molecular approaches for the study of Anthurium. Currently, genome size estimates have
been reported for only two Anthurium samples.

Methodology:
Bulk nuclear DNA content estimates were obtained by flow cell cytometry using leaf tissue
collected from Anthurium species of different subgeneric groups and from commercial cultivars.
The most current and well-supported topology of subgeneric, sectional relationships was
applied to present genome size estimates in the context of reported chromosome counts,
karyotypes, putative phylogenetic relationships, observed phenotypes and pedigree.

Principal results:
Genome size estimates based on bulk nuclear DNA content for 77 accessions representing 34
species and 9 cultivars were obtained, including initial estimates for 33 Anthurium species,
and both the smallest (Anthurium obtusum; Tetraspermium) and largest (Anthurium roseospadix;
Calomystrium) Anthurium genome sizes reported to date. Genome size did not distinguish
any subgeneric section, but ranged 5-fold (4.42–20.83 pg/2 C) despite consistent 2N = 30
chromosome counts. Intraspecies genome size variation >20% is reported for Anthurium
ravenii, A. watermaliense and A. gracile.

Conclusions:
Genome size estimates for Anthurium species spanning 13 recognized subgeneric sections indicate
that genome size does not generally correlate with chromosome count or phylogenetic
relationships. Mechanisms of genome expansion and contraction, including amplification and
reduction of repetitive elements, polyploidy, chromosome reorganization/loss, may be
involved in genome evolution in Anthurium as in other species. The new information on
Anthurium genome sizes provides a platform for molecular studies supporting further
research on genome evolution as well as cultivar development.

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Informasi Detail

Judul Seri

AoB PLANTS

No. Panggil

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Penerbit

Oxford : Oxford University Press., 2012

Deskripsi Fisik

AoB PLANTS 2012: pls006; doi:10.1093/aobpla/pls006

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

2012: pls006

Subjek

PEMULIAAN TANAMAN

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

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